Things to check: cookies (on, persistent, not getting dumped), your computer's time (same timezone as your account), proxy settings (if you're on a proxy, sometimes it messes with logins), and make sure you have the box checked that says "automatically log me in" when you log in.

I've decided to go back to using Firefox, and I try to login through Firefox and...it won't keep me logged in? But apparently its still working with Chrome?

What gives?

i actually had this problem with Chrome this week.i couldn't tell you why for certain but i had some security issues and after fixing my browser history just ended up sort of different, and it was constantly taking me to the log-in page instead of the usual "new posts" or index page.